using hard tab stops at $new_job so set noexpandtab

personally i don't care if you use hard or soft tab stops, it doesn't
bother me at all [1], but i like to be consistent with the rest of the
team / code base; so when doing a git diff and seeing something like
this:

                                my $description =
+                my $change = 'foo';
                                  defined $loginResult

it's frustrating because i remember that i have expandtab set in my
vimrc but the existing code uses hard tab stops [2]. so i am setting the
tab expansion off so i don't end up committing lots of code with an
indent level that is going to annoy everyone else

[1] unless you're one of those weirdos who likes to use obscure levels
of indentation like 1 space. really, come on now

[2] some would argue that any code committed should be run through
perltidy, but again i don't care either way and i am hesitant to use
any commit hook that changes the actual format of any code i or anyone
else has written